- Sep 21, 2013
- GA-Z370 AORUS Gaming 7-F13
- RX 580
- , ,
- Classic Mac
- Mobile Phone
https://support.microsoft.com/en-us/help/4090007/intel-microcode-updates , https://newsroom.intel.com/news/latest-intel-security-news-updated-firmware-available/ .
Microcode updates might be bug fixes, or in this case, security patches. sometimes simply updating microcode of cpu can restore some cpu performance because the Os can detect the hardware vulnerability is patched and disable software patches/work arounds that can cause performance drops. Not sure if macOS wil specifically look for things like that but windows will. Windows will detect microcode version of cpu and if it's > x revision it'll disable software patches.
since F12 specifically mentions microcode, it's a pretty strong assumption that it's the January security patch referenced here.